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I put together an upper called the DPMS 3G1, which is an 18" HBAR, with a New Frontier polymer lower.
It works fine with brass ammo, but I'm having trouble with shooting Wolf steel case ammo.
There are two problems, maybe related.
1. I will fire and the cartridge will eject, and it seems to cycle, but sometimes it doesn't strip a new round, and sometimes it does but doesnt reset the trigger (short stroking?)
2. I saw a small dent in the primer of a round which I had not pulled the trigger on. Sticky firing pin ?
The magazines work fine in my Sig 556. I haven't had any trouble shooting brass ammo, so I suspect that the gas system might be slightly marginal, and maybe the Wolf ammo is just not cycling it quite hard enough. Perhaps also the combination of the new bolt and chamber and the steel cases make enough friction to cause slight short stroking?
It works fine with brass ammo, but I'm having trouble with shooting Wolf steel case ammo.
There are two problems, maybe related.
1. I will fire and the cartridge will eject, and it seems to cycle, but sometimes it doesn't strip a new round, and sometimes it does but doesnt reset the trigger (short stroking?)
2. I saw a small dent in the primer of a round which I had not pulled the trigger on. Sticky firing pin ?
The magazines work fine in my Sig 556. I haven't had any trouble shooting brass ammo, so I suspect that the gas system might be slightly marginal, and maybe the Wolf ammo is just not cycling it quite hard enough. Perhaps also the combination of the new bolt and chamber and the steel cases make enough friction to cause slight short stroking?
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